Your are totally right but I didn't find any reference explaining that. In the manual from TI,
AM335x ARM® Cortex™-A8 Microprocessors(MPUs) > Technical Reference Manual - SPRUH73H > Session 24.2.3: McSPI pin list there is a description about SPIx_SCLK and you read: SPI serial clock (output when master, input when slave) > There is also one note at the bottom saying: (1)This output signal is also used as a re-timing input. The associated > CONF_<module>_<pin>_RXACTIVE bit for the output clock > must be set to 1 to enable the clock input back to the module. Thank you for the tip. > > On Tuesday, May 7, 2013 10:51:59 AM UTC-5, Wally Bkg wrote: > > Its a quirk of the SPI hardware as far as I can tell, even on the original > Beagleboard the SPI_CLK pinmux has to be set as an input. > > I agree it doesn't seem "logical". > > > On Tuesday, May 7, 2013 10:29:07 AM UTC-5, ky...@cranehome.info wrote: >> >> Isn't that the serial clock? Isn't it generated by the host and thus an >> output? Or is it generated by some hardware and taking it over as an >> output is clobbering that? >> >> On Tuesday, May 7, 2013 8:27:01 AM UTC-5, Alan Backlund wrote: >>> >>> Changing SCLK to an input works. >>> >>> Thank You >>> >> -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. To unsubscribe from this group and stop receiving emails from it, send an email to beagleboard+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
